I went to the park again. Under a tree, eating some seeds were two ducks. One was the oddly colored duck that I saw a few weeks ago.
A typical male Mallard was with her.
I may be jumping to conclusions, but in my mind the other duck is the same male I saw before and the dark duck is a female.
I also got some nice pictures of a pair of geese, one on a nest and another standing at a distance.